Machine for splitting piston rings



Dec. 30, 1947. H. M. OLSON MACHINE FOR SPLITI'ING PISTON RINGS Filed April 1, 1946 4 Sheets-Sheet 1 \uvau'rog Dec. 30, 1947. H. M. OLSON 2,433,575

MACHINE FOR SPLIT'IING PISTON RINGS Filed April 1, 1946 451198128-5118812 2 \NvzNTog HOLLY M OLsoN- MIL ' ATTORNEYS Dec. 30, 1947. H. M. OLSON v MACHINE FOR SPLITTING PISTON RINGS Filed April 1 1946 4 Sheets-Sheet 3 qHHHl IHI LUI I HI \nvaflfbn HOLLY M. OLSON ATTORNEYS VIC. 3;

Dec. 30, 1947. OLSON 2; 133576 MACHINE FOR SPLITTING PISTON RINGS Filed April 1, I946 4 Sheets- Sheet 4 \NvaNTbR" 3 ga 53 OLLY M.0L$0N v I ATTORNEYS v Patented Dec. 30, 1947 MACHINE FOR SPLITTING PISTON RINGS Holly M. Olson, Muskegon, Mich, assignor to Sealed Power Corporation, Muskegon, Mich., a

corporation of Michigan Application April 1, 1946, Serial No. 658,816

12 Claims.

Thi invention relates to a machine for the splitting or dividing of piston ring castings.

It is an object and purpose of the invention to produce a ring casting splitting or dividing machine of the type named, in which a plurality of the ring castings may be mounted on an arbor, with the arbor located in a predetermined position, and out of the way of the dividing saws which are used, and thereafter, by starting the machine in operation, moving the arbor with the ring castings thereon to a vertical position and move a plurality of saws toward and through the ring castings for splitting the castings. Said saws rotate about a vertical axis and when moved toward and into operative engagement with the castings divide them into two parts preferably, from each of which subsequently a piston ring is produced.

Further objects of my invention are to provide a machine, of which a battery of them may be mounted side by side, each being independently loaded with ring castings and each of which will automatically stop when the dividing sawing has been accomplished, the arbor being tilted outwardly when the dividing is done for removal of the split rings and replacement thereof by a successive plurality of ring castings for repetition of the cycle, to divide them in the same manner.

With the present invention a very heavy quantity production is secured. The machine which has been developed also has provisions for the necessary adjustments to adapt the machine for different sizes and widths of ring castings within prescribed limits, the machine not being restricted solely to the splitting of One diameter and thickness of ring casting. Many other objects and purposes will be understood from the following description, taken in connection with the ac,- companying drawing, in which,

Fig. 1 is a front elevation showing a battery of tWo of the machines of my invention located side by side.

Fig. 2 is a side elevation of the machine.

Fig. 3 is a vertical section from front to rear through the machine.

Fig. 4 is a fragmentary transverse section through the upper portion of the machine to illustrate the mounting of the movable saw carrying carriage.

Fig. 5 is a fragmentary vertical section through a ring holding arbor at the upper portion thereof.

Fig. 6 is a partial fragmentary side elevation and diagrammatic View of the electric and fluid pressure controlling circuits of the machine.

Like reference characters refer to like, parts in the different figures of the drawings.

A suitable horizontal supporting table or platform 9 is carried above the floor by vertical posts 2, upon which table one or more of the machines of my invention are mounted. In practice a battery of said machines may be located side by side, two of the machines being shown in Fig. 1. However, by enlarging the supporting table I the number of machines in a battery may be increased to any number desired.

At one end of the supporting structure a brack et 3 is secured for carrying a driving motor 4. A tank 5 for holding a, cooling liquid is mounted underneaththe table and is equipped with the usual pump 6 for circulating the liquid to desired portions of the machine. A front shield 1 (Figs. 2 and 3) reaches substantially to the ring casting carrying arbors, it being understood that the cooling liquid is pumped to and delivered on the ring casting while they are being saw divided into their parts.

The machine of the present invention includes a supporting body or housing 8 having spaced vertical sides and front and rear ends, said sides at their upper edge portion being provided with spaced horizontal guides 9 for the slidable mounting of an elongated housing Ill as shown in Figs. 3 and l. Said upper housing 10 has substantially the same length of the lower housing 8, and its front end portion is extended upwardly as indicated at M. It has a gear box 12 at the upper end thereof (Fig. 3) from which a sleeve l3 extends downwardly. A motor I secured at the upper side of the housing It, through belts and pulleys l5 drives a beveled pinion I6 within the gear box [2 which is in mesh with a beveled gear I1, also located Within the gear box, and through which a splined vertical shaft I8 extends. The shaft is passes downwardly through the sleeve 13 through a cylindrical body l9, within the sleeve l3 carrying suitable bearings for the shaft l8. The shaft 18 at its lower end is provided with a gang saw head 20 which carries a large number of spaced parallel circular metal cutting saws 2| which are driven by the motor I 4 to turn rapidly about the vertical axis of the shaft I8. The lower end of said shaft below the saws is supported by bracket 22, adjustably mounted on a post extending downwardly from the housing 10.

A bracket 23 is connected to the member is and extends through a vertical slot in the sleeve I3 and has a screw 24 passing through it, said screw having free rotation through a lug extending outwardly from the sleeve [3 as shown in Fig. 3.

With this construction, the saws 2| are adjustable vertically for a limited distance, sufficient to take care of the range of ring castings which may be processed on the machine and to properly locate the saws so that they will divide all of the ring castings which they process substantially midway between their opposite flat sides.

At the front end of the machine an arbor carrying housing structure 25 is mounted upon suitable trunnions 26 which turn about a horizontal axis, being mounted in bearings at their ends carried at the front of the supporting housing 8. The housing 25 is of a generally cylindrical form and at its upper end has a member 2! of a somewhat similar form located. A hollow spindle 28 passes through bearings therefor in the member 21 and housing 25 as shown in Fig. 3. Said spindie at its upper end is adapted to have a ring casting carrying arbor detachably connected therewith.

The detailed construction of said arbor is the subject matter of another application for a patent and its specific structure need not be entered into in detail. It includes a body 29 of a generally cylindrical form, having a detachable threaded connection of the upper end portion of the spindle 28, around which a plurality of ring castings 36 (Fig. may be placed in superimposed relation to each other, the lowermost casting resting upon the lower end enlarged portion of the arbor body. Radially expanding ring casting engaging members, generally indicated at 3!, are carried by the body 29 and are forced outwardly on longitudinal upward movement of an actuating member 32 which has inclined surfaces to engage complementary surfaces at the inner edges of the member 3!. The member 32 is connected at the upper end of a rod 33 which passes through the hollow spindle 28 and through the lower end of the housing 25.

The spindle 28 at its lower end is equipped with a worm gear 34 which is in mesh with a worm 35, secured to a short shaft 36 mounted on and extending through the sides of the housing 25, whereby on driving the shaft 35, the arbor and the ring castings carried thereby are turned about the axis of spindle 28. The rod 33 at its lower end extends into a short cylinder 31 connected with the lower end of the housing 25 and, as indicated in dotted lines in Fig. 3, a piston is secured to the lower end of the rod 33 within the cylinder. It is evident that on the application of fluid pressure at the lower side of the piston, rod 33 and the member 32 will be elevated and when entered at the upper side of the piston, such rod and member will be withdrawn or lowered with a consequent release of the ring castings 30, this in practice occurrirg after they have been divided substantially midway between their upper and lower sides.

The driving motor 4, through belts 38 and pulleys 39 drives a horizontal shaft 46 which is coupled by a suitable coupling 4! (Fig. 1) with a like shaft for each of the ring casting splitting machines which are mounted side by side in a battery of such machines, two thereof being shown in Fig. 1. The shaft 40 at the back of the housing 8 (Fig. 2) is provided with a beveled gear 42 in mesh with a second beveled gear 43 connected with a short shaft which at its front end, through a universal joint 44, is connected with the rear end of a sleeve shaft 45. A shaft 46, at its rear end, has a telescopic entrance into the sleeve shaft 45 at the front portion thereof, the two shafts, 45, and 46 are equipped with complementary clutch elements 41 so that when such clutch elements are engaged and held in engagement by the spring 48 shown, the shaft 46 will be continuously driven by the continuously rotating shaft 40. Shaft 46 at its front end has a universal joint connection at 49 with a short shaft equipped with a beveled pinion 50 which has meshing engagement with .a similar gear 5| secured at one end of the previously described shaft 36. Thus when the clutch at 4'! is in operatively connected relation, shaft 36 by means of the worm 35 thereon drives the arbor carrying spindle 28 in continuous rotation.

The trunnion mounting at 26 of the arbor carrying housing 25 permits said housing and the arbor carried thereby a forward tilting movement from vertical position. In the vertical position, as shown in Fig. 2, the clutch at 41 is connected but in the forwardly tilted position, shown in Figs. 3 and 6, shaft 46 is bodily moved in a forward direction and clutch 41 is disconnected, whereupon the motor driven shaft 49 may continue to rotate but the arbor and the ring castings thereon are at rest.

The shaft 40 (Fig. 3) carries a worm 52 which is in mesh with a worm wheel 53, mounted for free rotation on a shaft indicated by dotted lines 54, which extends through the rear end of the housing 8 and is mounted at its front end in a suitable housing carrier therefor cast integral with the housing 8. A collar 55 is splined on shaft 54 back of the gear 53. Said collar and the worm gear have cooperating clutch elements 51 which, when the collar is free to move, are brought together by a coiled pressure spring 56. A vertically positioned lever 58 is pivotally mounted between its ends back of the shaft 49 and the housing 8. At its lower end a rod 59 is pivotally connected and extends forward and is connected with a hand lever 66 pivotally mounted at one end on the base of the machine housing, the rod 59 being attached between the ends of said hand lever. Lever 58, between its ends, has an opera tive connection with the collar 55 for moving it on turning. Said lever 58 and at its upper end is equipped with an adjustable screw 6| which passes through it from rear to front, and normally bears at its front end against the rear side of an armature 62 depending from and below a vertical solenoid 63.

Solenoid 63 is secured to a bracket 64 which is mounted on a bar 65 located lengthwise of and at the under side of the housing In bein held in place by the under plate 65 (Fig. 4). When the armature B2 is in its lowermost position as in Figs. 2 and 3, it bears at its front lower portion against the rear end of the bar 65.

The bar 65 at its upper side is provided with a consecutive series of rack teeth 61. A segmental gear 68 is in mesh with the rack teeth and is secured to a short shaft 59 which passes through and has bearing on a side of the housing ID, A hand lever 16 is securely connected at the outer end of said shaft (Fig. 2), on which a holding member H is mounted and which may be releas ably secured at a side of the housing I0 to hold the hand lever 16 in any position to which it may be adjusted. In such adjustment, a graduated indicating scale 12 on the housing l9, and a pointer 73 on the lower housing 8 are referred to for a proper adjustment of the saws 2|, so that they cut through the ring castings 30 sufficiently but not too far in the machine operation. When the adjustment is made and the hand lever 'l' secured against movement, the bar 65 and the simula downwardly extended plug I6 fixed to the saws 2| forward to cut through the ring castings 39, and retracting them to disengage therefrom after the splitting operation has been completed. As will hereinafter be described, the turning of the shaft 59 is only through one revolution in each cycle of operations of the machine.

The arbor carrying housing 25 is tilted back and forth between inclined and vertical positions by means of pressure cylinders 17, one at each side of the machine, pivotally mounted at their rear ends on supporting brackets 18. a piston therewithin, and a piston rod I9 extending from the piston forwardly to connect with the arbor carrying housing 25 above its trunnion axis of turning.

The pistons within the cylinders TI actuated by pressure fluid, such as compressed air or other equivalent conducting conduits 89 and BI lead to front and rear ends of the cylinders 71, and in the conduits 89 a manually operable valve 82 is interposed. Such fluid pressure carrying conduits 69 and 8I are connected with other conduits 93 and 99, respectively, between their ends, and at the front ends such pipes 83 and 89 are connected with a member 85 at the lower side and depending from cylinder 31 and with suitable passages, which need not be described in detail, for the passage of the pressure fluid simultaneously to the rear ends of the cylinders I1 and above the piston in the cylinder 37 (Fig. 3), so as to retract Each has and draw down the expanding mandrel 32 when the housing is tilted forwardly, when the pressure fluid passes through the pipes 89 to the forward ends of cylinders 11 there is a simultaneous passage of the fluid into cylinder 31 below its piston for expanding the radial members 3| against the ring castings 99 when the arbor is brought to its vertical position directly opposite the saws 2I.

At their other ends the conduits or pipes 93 and 89 are connected with a suitable valve housing 89 which has air inlets and air exhaust connections 81 and B8 and within which is a rotary valve, alternately directing the pressure fluid into the pipes or conduits 83 and 94. To operate the valve, an arm 99 is loosely mounted on the valve shaft extending through at least one side of the housing 86 and on said shaft a ratchet wheel 99, with four equally spaced teeth is secured, a dog on the arm 89 bearing against said wheel. The arm is rocked by the connection, through a link 95, to an armature of a solenoid 92, so that when the solenoid is energized by closing an electric circuit in which the solenoid is located, said arm is rocked upwardly and thence downwardly and the valve turned through an arc of 90. The valve has proper fluid pressure passages through it for conducting the pressure fluid through the conduit connections directed to the opposite ends of the cylinders 11 and 31.

The solenoid 63 previously described is in an electric circuit having wires 93 and 94 connected with the source of electric current, the solenoid being interposed in the length of the wire 93. Both the wires 93 and 94 lead to and are connected with a switch, the opening and closing of which is controlled by a movable lever (Fig. 6) Such lever is in the path of movement of a bell crank actuator 96 pivotally mounted on a carrying plate 97 which is secured to the piston rod 79. With the arbor in inclined position as shown in Figs. 3 and 6, the rearward movement of the piston rod causes the switch arm to be momentarily turned clockwise to the rear to close the circuit and energize solenoid 63 to elevate the armature 62 which, being withdrawn, frees lever 59 to move under the pressure of the spring 56, whereupon the clutch elements at 51 are connected together and shaft 54 with its drum I4 rotated. The momentary clockwise turning movement of lever 95 closes the circuit as the ring casting carrying arbor 29 and the rings thereon come to operative vertical position shown in Fig. 2. After the lever 96 has passed over the switch arm 95, such switch arm returns to its normal position (Fig. 2) thereby breaking the circuit and permitting the armature 62 to drop. The drum I9 makes its complete revolution causing a forward movement of the housing I9 and th ring castings are sawed into two parts. The end of the screw 6| is stopped in forward movement after the clutch has engaged so that on release of the armature 62, it may move at its lower end between the rear end of the bearing 65 and the screw 6|, whereby on the returned rear movement of the housing I9, after the ring castings have been sawed, lever 59 at its upper end is turned to the rear and the clutch disengaged. Therefore, the rotation of the drum M is a single rotation only until a repetition of the rearv movement of the arbor carrying housing occurs. It is, of course, apparent that on an outward movement of the rod 79, the switch arm 95 is not actuated as the bell crank lever 96 rides freely thereof.

Before the described movements of the ring carrying arbor may take place, it is necessary to start the machine in operation and selectively direct the fluid pressure to the forward ends of the cylinder 'II through an energizing of the solenoid 92. To accomplish this, the solenoid is connected at one end of its winding with an electric circuit wire 99 which, together with a second wire '98, lead to a source of electric current. The wire 99 leads to a switch box I99 and connects to one side of the switch therein. Another circuit wire I9I connected to the opposite side of the switch leads to the opposite end of the solenoid winding 92, whereby when the switch at I99 is closed, solenoid 92 is energized. Connected to the wires 99 and I9I are branch wires I93 and I94 respectively which lead to opposite sides of a switch having an actuating lever or arm I92. The single rotation of the shaft 54 turns an arm I95 secured at the rear end thereof through a complete circumference, the free end of the switch arm I92 being in the path of movement of said finger or arm I95.

The switch at I99 is closed manually by pushing on a rod I96 which, at its front end, at the front of the machine has a push button head I97. When the rod is moved to the rear it closes the switch I99 as long as the rod is held against the spring I98 (Fig. 6), which spring will move the rod away from switch closing position as soon as pressure on the head I91 is removed. The momentary operation of the switch arm I92 occurs at the end of the single rotation of the shaft 59, or, as diagrammatically shown in Fig. 6, the finger I95 turning in a clockwise direction will en In the useof the machine, assuming the arbor 1 at 29 without ring castings thereon and in a forward tilting position as in Fig. ,3' or 5,, the machine operator places astack of ring castings 30 over the jarbo'r, this being readily done .as the expanding mam-n32 is withdrawn, andthen presses upon, the head mm thelplish re I'njs.

The circuit throughthesolenoid 52 is closed an the pistons within thecylinder Tl move toth'e rear automatically connecting the clutch at, 4'! substantially at the completion of such.move inent, and momentarily closing the switchcoritrolledby the arm 9,5with1anelevationof the armature 62 and an automatic engagement of the clutch at 5]. Thereupon the shaft 54 and dru'rfi 7 4 start turning their single revolution witha feeding forward of the dividing saws 2]. Such forward feeding preferably is relatively, slowand may be controlled by the shape of the groove 1 5 The finger I05 (Fig. 6) moves away from' the switch arm [02, When thejorward movemen'tv suflicient to carry the saws through the ring castings 39 hastaken place, the engagementcf the projection or plug I 6 in the groove will return the carriage or housing iii, to the rear, the return preferably being more rapid than the for ward movement and, of course, controll ed by the shape of the groove 15, thereby Withdrawing the saws. And the solenoid 63 having had its circuit broken, armature 62 will have dropped into the rearward path of the bar 65, and engaging the screw 6!, will cause a disconnection of. a clutchflow of fluid pressure to the cylinders l1 and moving the arbor with the divided castings thereon outward into position for removal of the divided I castings and their replacement by a new lot of double width ring castings. As previously stated the clutch; at 41 will be disconnected and the arbor be at rest during such remo'valand replace-- ment, Also, as previously described, the divided ring castings will be released for removal on such outward tilting of the rin ,arbor,and the ring. cas'tingswhich are to be processed'will be gripped and held to turnwith the arbor when moved to' vertical position for the following processing.

The manual levers Sllj and 82 are for interrupting or stopping the normal substantially auto-r matic movements, or for controlling them during the setting up of a machine for a particularsize or dimension of ring ca ting to be processed, Each new set-up may require, an, adjustment "of. the'housing in to the bar 65 and thisis controlled by the handle 10'. The flow of liquid tolthefrbht,

ends of the cylinder ll may be cut off by closing the valve at 82, and the plut'ch at 5? may be con-i trolled as to its' opening or closing by the hand lever on in thesetting up operation. H V

The construction is one vvith which is per:

formed a e re r; i jfin r am so: th

double width are castings into twopair each of which a piston ring maybe obtained. The, machine attendantis required substantially only to place the ringcastings to be processed on anarbor, push the switch closing head at I01, be ets to the next machines in succession and do the. same things. ,After he has taken care. of battery ormachines, he returns to thefirst machine, removes the divided castings and re- Iplacesfthem with anew number of castings to Die rocessed again starting the machine in op- "n by pushingon the head .I O'I. This, of ,is done in succession with all of the maaim which heattends. x I

, .While the. disclosure has beenmade with reseem to dividing the ring castings into two parts and, preferably, suchdivision is one substantially iihiyersallyused, of eourse, it is to be understood that wider castings may be divided into a larger number of parts without change in the invention;

and the invention is not, to be limited solely in idsetothe two part dividing or splitting of double ring widthcastings. H V The invention is defined in the appended claims and is to be considered comprehensive of all forms oi structure coming within their scope.

Iclaimrn Y 1. ,In a machine as described, an arbor mounted for tilting movement between a vertical and a forwardly inclined position, said arbor being adapted to hold ,a plurality of superimposed piston/ring castings, continuously operated driv ing. means for said arbor, means connecting the driving means with the vdriving arbor to drive it when in vertical position and automatically dis;

anteen-1 movement of the arbor to tilted posi- Lion; a vertically disposed shaft, a plurality of saw's carried thereby one for each of said ring castings; means for continuously driving the shafh amo ame carriageon which said driving mear'is' and, said shaft are mounted for movement toward and away. from said ringcastingswhen the ,,arbor is in vertical position, and means for moving s aidjcarriage toward said ring castings, whenthe arbor is moved .to vertical position to saw therethrough between the upper and lower sides, or each. or. said I castings, and for retracting the saws after saidsawing through has been com pleted. o V M 2. A structure as definedin claim 1, said means for moving theflcarriage including. a shaft normally at rest, means for automatically connectme said shaft with said continuously operable driving means .for thearbofr substantially. simultaneously with the .movei'nent of the arbor to verticalposition; and meanson' return of th car-Q riage to its initial positiodafter. the sawing throughoi the ring castings has been completed, ana gesia f ruis'connectine saidshait after the. rotation thereoi through one complete turning about its longitudinal axis.

3, In' at construction as .described an arbor a spindle extending therefrom, alh'ousin'g through which the, spindle extends, meansfifor tiltably.

mounting said housing tomove between positions in one of which said arbor and spindle are VET-v tically' disosed', and in'the-otherioi whichthey are inclined to the vertical, meansfor. driving the spindle, a rod associated with the arbor and extending therebelow, radial jaws associated frail? 5 reasab y some 0 therewith andcarriedby the ar'bor moved outwar dly on movement orsaid rod in one direction sedonjn'ovementthereofin the opposite whereby afplurality ofring castings may ifid aroundsaid arbor and re create turn therewith, pneumatic means including a piston cylinder structure connected with said rod for moving it in opposite directions, a second pneumatic means connected with said tilting housing, including a piston and cylinder for Controlling the flow of pressure fluid to said piston cylinder structures to simultaneously force out said ring casting engaging jaws upon operation of housing tilting piston cylinder structure to move the arbor to a vertical position, and for releasing said castings on operation of said piston cylinder structure to move the arbor to its tilted position.

4. A construction as defined in claim 3, said control means including a rotary valve, a solenoid and armature connected with the valve to alternately connect fluid pressure with opposite sides of said pistons in said piston cylinder structures, an electric circuit in which the solenoid is included having a normally open switch therein, manual means for closing said switch, a second normally open switch in said circuit, and a driving means including rotatable shaft and a finger extending therefrom to momentarily close the second switch on a complete rotation of said shaft.

5. In a machine as described, a supporting housing, an arbor carrying housing located at the front thereof and mounted on the first housing to tilt from a vertical to a forwardly tilted position and vice versa, a vertically positioned arbor mounted for rotation at the. upper end of the arbor carrying housing, a continuously operable driving means, means for releasably connecting and disconnecting said driving means with said arbor to rotate the arbor about a vertical axis when its auxiliary housing is located in a vertical position and to disconnect the arbor from said driving means when in forwardly tilted position, said arbor adapted to be located therearound a plurality of superimposed p ston ring castings, a carriage mounted at the upper side of the housing for forward and rear movements, a vertical shaft mounted for rotation on the carriage at the front portion thereof, positioned back of and parallel to the vertical axis of rotation of said arbor when said arbor is in vertical position, a plurality of horizontally spaced casting cutting saws mounted on said shaft, means to continuously drive the shaft, means normally disengaged from said continuous driving means, the operation of which will move said carriage, a predetermined distance in a forward direction and back to initial position, means for moving the arbor to vertical position and back to tilted position, and manually operable means for substantial simultaneously rendering said last tilting 1 means operable to move the arbor to vertical position from its tilted position and for connecting the carriage moving means with said continuously driving means, combined with means operated by said carriage moving means for rendering the arbor tilting means operative a second time when the carriage has made a reciprocable movement forward and a return reciprocable movement to its initial rear position.

6. A construction as defined in claim 5, combined with means for connecting said piston ring castings with the arbor simultaneously with the movement of said arbor to vertical position, and for releasing said castings upon movement of the arbor to its tilted position.

7. In a machine as described, a support, a housing tiltably mounted at the front of the support for rocking movement about a horizontal axis, a driven arbor mounted at the upper of the housing adapted to be located with its axis vertical with the housing in one position, a piston rod connected with said housing, a cylinder into which the piston rod extends, means for alter nately conducting a pressure fluid to opposite ends of the cylinder to move the piston rod longitudinally and change the position of the said housing from vertical to inclined and vice versa, a rotatable shaft normally at rest, continuously operable driving means adapted to be connected with said shaft, a clutch for connecting said driving means with the shaft, an electric circuit including a solenoid and armature, said armature in one position holding the clutch disengaged, means mounted on said piston rod to move said armature into clutch freeing position to connect said shaft with the driving means occurring on moving said housing to vertical position, a plurality of saws mounted to turn about a vertical axis, a moveable carriage therefor, interengaging means on said carriage and shaft for moving the saws toward the arbor and returning the saws to the initial position, said armature on said return being freed to occupy its initial position to free disconnect said clutch to free the shaft from said driving means.

8. In a construction of the class described a support, a housing mounted for tilting movement on said support for movement between vertical and forwardly inclined positions, a ring casting holding arbor mounted for rotation about a vertical axis located at the upper end of said housing, a carriage slidably mounted on said support for forward and backward reciprocating movements, a vertical shaft mounted at the front end of said carriage, a plurality of spaced horizontal saws at the lower end of said shaft back of said arbor when it is in vertical position, fluid pressure piston cylinder means connected with said housing for moving it to vertical and inclined positions, means for entering said fluid alternately to opposite ends of said piston cylinder means effective to move alternately said housing to vertical and inclined positions, a rotatably mounted shaft, a continuously operable driving means, releasable clutch means for connecting said shaft and driving means interposed in the path of said carriage, interengaging means for moving the carriage for ward and thence rearwardly when the shaft is driven by connection to said driving means, and means for connecting the clutch to eifectsuch action upon movement of the housing and arbor to vertical position, said clutch being disconnected by movement of the carriage upon return thereof to rear position where said shaft has turned one complete revolution.

9. A construction as defined in claim 8, and a driven spindle to which said arbor is connected, gearing and shaft means between said spindle and the driving continuous means including telescoping shaft members brought together when the housing is moved to vertical position and separated when said housing is moved outwardly to tilted position.

10. In a machine as described, an arbor mounted for tilting movement between two angular positions, said arbor being adapted to hold a plurality of piston rings in side by side relation to each other, continuously operated driving means for said arbor, means connecting the driving means with the arbor to drive it when in one position and automatically disconnect it on movement of the arbor t0 the other position, a shaft disposed in parallelism to the axis of the arbor when said arbor is driven, a plurality of saws carried thereby, one for each of said ring castings, means for 11 continuously driving the: shaft, a movable carriageoniwhichsaidshaft is mountedmovableto ward and away fromifsaid castings whenthe arbor is: in itswdri-ven positions iand -means 1 for movin said carriagetoward said ring castings a when the arbor-is moved-- to its driven --position to: saw through between the 0pp0sed-flatside of each of said-castings; and :for retracting thesawsafter said sawingthrough has -beencompleted; .41. In a machine as described;-a driven shaft, 2, plurality of spaced saWs carr-ied thereby,-means fordriving the-shaft, a movable'carriage upon which said shaft-and said drivingmeans are mounted; a ring casting carrying arbor, means formounting said arbor fonmovement from one position in which its axis is substantially parallel to saidsha-ftto another inclined thereto withthe arbor movedaway from said 7 saws, said arbor being: adapted to carry a'casting to be sawed through from its outer.--to-its inner curved side by said- -saws, means fordriving saidarbor when in aesame 12 the first mentioned position, said means being disconnected when the arbor :is in-' the second-"p0 sition; andmea'ns for moving said shaft and 'saw carrying carriage toward the arbor-and the bast= ing thereon "when the arboris nioved" to the first mentioned positionand for retracting them after the casting has been sawed through by said saws. 12. A' construction asuefined'in ciaim-11jand means for 'moving thearbor to' the second men tioned position upon said'saws being retracted. 'HOLLY- M. OLSON.

REFERENCES CITED file of thispatent UNITED Number Name 1 Date 1,900,755 Bruce ..L Mar. 7 193 3 Farkas et al. Dec, 5, 1944 2373907 Olson"; Apr. 17, 1945 

